mirror of https://github.com/adamdruppe/arsd.git
Refactor blocks
This commit is contained in:
Elias Batek
parent
23e3d59538
commit
486195859c
325
pixmappaint.d
325
pixmappaint.d
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@ -219,191 +219,188 @@ private struct OriginRectangle {
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}
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}
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private {
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@safe pure nothrow @nogc:
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// misc
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private {
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Point pos(Rectangle r) => r.upperLeft;
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}
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// Alpha-blending functions
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@safe pure nothrow @nogc {
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// ==== Alpha-blending functions ====
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///
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public void alphaBlend(scope Pixel[] target, scope const Pixel[] source) @trusted
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in (source.length == target.length) {
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foreach (immutable idx, ref pxtarget; target) {
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alphaBlend(pxtarget, source.ptr[idx]);
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}
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}
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///
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public void alphaBlend(ref Pixel pxTarget, const Pixel pxSource) @trusted {
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pragma(inline, true);
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immutable alphaSource = (pxSource.a | (pxSource.a << 8));
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immutable alphaTarget = (0xFFFF - alphaSource);
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foreach (immutable ib, ref px; pxTarget.components) {
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immutable d = cast(ubyte)(((px * alphaTarget) + 0x8080) >> 16);
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immutable s = cast(ubyte)(((pxSource.components.ptr[ib] * alphaSource) + 0x8080) >> 16);
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px = cast(ubyte)(d + s);
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}
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///
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public void alphaBlend(scope Pixel[] target, scope const Pixel[] source) @trusted
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in (source.length == target.length) {
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foreach (immutable idx, ref pxtarget; target) {
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alphaBlend(pxtarget, source.ptr[idx]);
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}
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}
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// Drawing functions
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@safe pure nothrow @nogc {
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///
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public void alphaBlend(ref Pixel pxTarget, const Pixel pxSource) @trusted {
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pragma(inline, true);
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/++
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Draws a single pixel
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+/
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void drawPixel(Pixmap target, Point pos, Pixel color) {
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immutable size_t offset = linearOffset(target.width, pos);
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immutable alphaSource = (pxSource.a | (pxSource.a << 8));
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immutable alphaTarget = (0xFFFF - alphaSource);
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foreach (immutable ib, ref px; pxTarget.components) {
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immutable d = cast(ubyte)(((px * alphaTarget) + 0x8080) >> 16);
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immutable s = cast(ubyte)(((pxSource.components.ptr[ib] * alphaSource) + 0x8080) >> 16);
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px = cast(ubyte)(d + s);
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}
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}
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// ==== Drawing functions ====
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/++
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Draws a single pixel
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+/
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void drawPixel(Pixmap target, Point pos, Pixel color) {
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immutable size_t offset = linearOffset(target.width, pos);
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target.data[offset] = color;
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}
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/++
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Draws a rectangle
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+/
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void drawRectangle(Pixmap target, Rectangle rectangle, Pixel color) {
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alias r = rectangle;
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immutable tRect = OriginRectangle(
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Size(target.width, target.height),
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);
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// out of bounds?
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if (!tRect.intersect(r)) {
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return;
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}
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immutable drawingTarget = Point(
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(r.pos.x >= 0) ? r.pos.x : 0,
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(r.pos.y >= 0) ? r.pos.y : 0,
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);
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immutable drawingEnd = Point(
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(r.right < tRect.right) ? r.right : tRect.right,
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(r.bottom < tRect.bottom) ? r.bottom : tRect.bottom,
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);
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immutable int drawingWidth = drawingEnd.x - drawingTarget.x;
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foreach (y; drawingTarget.y .. drawingEnd.y) {
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target.sliceAt(Point(drawingTarget.x, y), drawingWidth)[] = color;
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}
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}
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/++
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Draws a line
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+/
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void drawLine(Pixmap target, Point a, Point b, Pixel color) {
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import std.math : round, sqrt;
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// TODO: line width
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// TODO: anti-aliasing (looks awful without it!)
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float deltaX = b.x - a.x;
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float deltaY = b.y - a.y;
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int steps = sqrt(deltaX * deltaX + deltaY * deltaY).typeCast!int;
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float[2] step = [
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(deltaX / steps),
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(deltaY / steps),
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];
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foreach (i; 0 .. steps) {
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// dfmt off
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immutable Point p = a + Point(
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round(step[0] * i).typeCast!int,
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round(step[1] * i).typeCast!int,
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);
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// dfmt on
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immutable offset = linearOffset(p, target.width);
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target.data[offset] = color;
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}
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/++
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Draws a rectangle
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+/
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void drawRectangle(Pixmap target, Rectangle rectangle, Pixel color) {
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alias r = rectangle;
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immutable offsetEnd = linearOffset(b, target.width);
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target.data[offsetEnd] = color;
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}
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immutable tRect = OriginRectangle(
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Size(target.width, target.height),
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);
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/++
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Draws an image (a source pixmap) on a target pixmap
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// out of bounds?
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if (!tRect.intersect(r)) {
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return;
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}
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Params:
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target = target pixmap to draw on
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image = source pixmap
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pos = top-left destination position (on the target pixmap)
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+/
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void drawPixmap(Pixmap target, Pixmap image, Point pos) {
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alias source = image;
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immutable drawingTarget = Point(
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(r.pos.x >= 0) ? r.pos.x : 0,
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(r.pos.y >= 0) ? r.pos.y : 0,
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);
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immutable tRect = OriginRectangle(
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Size(target.width, target.height),
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);
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immutable drawingEnd = Point(
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(r.right < tRect.right) ? r.right : tRect.right,
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(r.bottom < tRect.bottom) ? r.bottom : tRect.bottom,
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);
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immutable sRect = Rectangle(pos, source.size);
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immutable int drawingWidth = drawingEnd.x - drawingTarget.x;
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foreach (y; drawingTarget.y .. drawingEnd.y) {
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target.sliceAt(Point(drawingTarget.x, y), drawingWidth)[] = color;
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}
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// out of bounds?
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if (!tRect.intersect(sRect)) {
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return;
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}
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/++
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Draws a line
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+/
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void drawLine(Pixmap target, Point a, Point b, Pixel color) {
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import std.math : round, sqrt;
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immutable drawingTarget = Point(
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(pos.x >= 0) ? pos.x : 0,
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(pos.y >= 0) ? pos.y : 0,
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);
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// TODO: line width
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// TODO: anti-aliasing (looks awful without it!)
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immutable drawingEnd = Point(
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(sRect.right < tRect.right) ? sRect.right : tRect.right,
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(sRect.bottom < tRect.bottom) ? sRect.bottom : tRect.bottom,
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);
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float deltaX = b.x - a.x;
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float deltaY = b.y - a.y;
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int steps = sqrt(deltaX * deltaX + deltaY * deltaY).typeCast!int;
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immutable drawingSource = Point(drawingTarget.x, 0) - Point(sRect.pos.x, sRect.pos.y);
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immutable int drawingWidth = drawingEnd.x - drawingTarget.x;
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float[2] step = [
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(deltaX / steps),
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(deltaY / steps),
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];
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foreach (i; 0 .. steps) {
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// dfmt off
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immutable Point p = a + Point(
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round(step[0] * i).typeCast!int,
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round(step[1] * i).typeCast!int,
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);
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// dfmt on
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immutable offset = linearOffset(p, target.width);
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target.data[offset] = color;
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}
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immutable offsetEnd = linearOffset(b, target.width);
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target.data[offsetEnd] = color;
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}
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/++
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Draws an image (a source pixmap) on a target pixmap
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Params:
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target = target pixmap to draw on
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image = source pixmap
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pos = top-left destination position (on the target pixmap)
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+/
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void drawPixmap(Pixmap target, Pixmap image, Point pos) {
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alias source = image;
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immutable tRect = OriginRectangle(
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Size(target.width, target.height),
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);
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immutable sRect = Rectangle(pos, source.size);
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// out of bounds?
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if (!tRect.intersect(sRect)) {
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return;
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}
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immutable drawingTarget = Point(
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(pos.x >= 0) ? pos.x : 0,
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(pos.y >= 0) ? pos.y : 0,
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);
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immutable drawingEnd = Point(
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(sRect.right < tRect.right) ? sRect.right : tRect.right,
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(sRect.bottom < tRect.bottom) ? sRect.bottom : tRect.bottom,
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);
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immutable drawingSource = Point(drawingTarget.x, 0) - Point(sRect.pos.x, sRect.pos.y);
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immutable int drawingWidth = drawingEnd.x - drawingTarget.x;
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foreach (y; drawingTarget.y .. drawingEnd.y) {
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target.sliceAt(Point(drawingTarget.x, y), drawingWidth)[] =
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source.sliceAt(Point(drawingSource.x, y + drawingSource.y), drawingWidth);
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}
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}
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/++
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Draws a sprite from a spritesheet
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+/
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void drawSprite(Pixmap target, const SpriteSheet sheet, int spriteIndex, Point pos) {
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immutable tRect = OriginRectangle(
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Size(target.width, target.height),
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);
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immutable spriteOffset = sheet.getSpritePixelOffset2D(spriteIndex);
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immutable sRect = Rectangle(pos, sheet.spriteSize);
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// out of bounds?
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if (!tRect.intersect(sRect)) {
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return;
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}
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immutable drawingTarget = Point(
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(pos.x >= 0) ? pos.x : 0,
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(pos.y >= 0) ? pos.y : 0,
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);
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immutable drawingEnd = Point(
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(sRect.right < tRect.right) ? sRect.right : tRect.right,
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(sRect.bottom < tRect.bottom) ? sRect.bottom : tRect.bottom,
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);
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immutable drawingSource =
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spriteOffset
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+ Point(drawingTarget.x, 0)
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- Point(sRect.pos.x, sRect.pos.y);
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immutable int drawingWidth = drawingEnd.x - drawingTarget.x;
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foreach (y; drawingTarget.y .. drawingEnd.y) {
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target.sliceAt(Point(drawingTarget.x, y), drawingWidth)[]
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= sheet.pixmap.sliceAt(Point(drawingSource.x, y + drawingSource.y), drawingWidth);
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}
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foreach (y; drawingTarget.y .. drawingEnd.y) {
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target.sliceAt(Point(drawingTarget.x, y), drawingWidth)[] =
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source.sliceAt(Point(drawingSource.x, y + drawingSource.y), drawingWidth);
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}
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}
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/++
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Draws a sprite from a spritesheet
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+/
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void drawSprite(Pixmap target, const SpriteSheet sheet, int spriteIndex, Point pos) {
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immutable tRect = OriginRectangle(
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Size(target.width, target.height),
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);
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immutable spriteOffset = sheet.getSpritePixelOffset2D(spriteIndex);
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immutable sRect = Rectangle(pos, sheet.spriteSize);
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// out of bounds?
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if (!tRect.intersect(sRect)) {
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return;
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}
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immutable drawingTarget = Point(
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(pos.x >= 0) ? pos.x : 0,
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(pos.y >= 0) ? pos.y : 0,
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);
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immutable drawingEnd = Point(
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(sRect.right < tRect.right) ? sRect.right : tRect.right,
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(sRect.bottom < tRect.bottom) ? sRect.bottom : tRect.bottom,
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);
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immutable drawingSource =
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spriteOffset
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+ Point(drawingTarget.x, 0)
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- Point(sRect.pos.x, sRect.pos.y);
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immutable int drawingWidth = drawingEnd.x - drawingTarget.x;
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foreach (y; drawingTarget.y .. drawingEnd.y) {
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target.sliceAt(Point(drawingTarget.x, y), drawingWidth)[]
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= sheet.pixmap.sliceAt(Point(drawingSource.x, y + drawingSource.y), drawingWidth);
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}
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}
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